Combined filter and valve for gaseous fuel



May 2, 1950 E. H. MUELLER COMBINED FILTER AND VALVE FOR GASEOUS FUEL Filed Dec. 4; 1947 JNVENTOR. frv/h Mae/Afr A TTOR/VEYS Patented May 2, 1950 UNITED STATES PATENT OF Fl'CE 2 ,506,313 COMBINED FILTER AND VALVE FOR GASEOUS FUEL Ervin H. Mueller, Grosse Pointe, Mich. Application December- 4, 1947, Serial No. 789,635

(01. ma -s9) 3 Claims.

This invention relates to a combined filter and valve especially for the purpose of filtering and controlling the supply of gas for a pilot flame of gas burning equipment.

Because of the small passages and. the small flame of a pilot burner, it is desirable to filter the gas in order to entrap included matter, such as carbon or the like, which may otherwise tend to clog such passageways. At the same time it is desirable to have a control over the supply of gas in order that the size of the pilot flame may be regulated and so that when necessary or desirable the supply of gas may be completely shut off.

It is the particular object of this invention to provide a filter for the above purposes which can be easily and cheaply manufactured so that it can be furnished to the trade at a low cost and to incorporate in the construction a valve con struction for regulating the flow of gas. The idea is to employ a combination construction in the sense that the valve is incorporated in the filter housing in such a way as to materially reduce manufacturing cost and simplify the construction to th end that a separate valve housing is not needed. To this end valve arrangement of unusu'al construction, which rather radically departs from the practice heretofore of providing a separate valve member and housing therefor, is incorporated in the filter housing. This construction resides essentially in but two added element and yet an efilcient low cost structure is provided.

The structure shown in the accompanying drawings illustrates one form of the invention.

Fig. 1 is a general view rather schematic in form illustrating the top burners of a gas range and showing the pilot and filter and valve airrangement.

Fig. 2 is an enlarged cross sectional view taken substantially on line 22 of Fig. 1 showing the filter and valve arrangement.

Fig. 3 is a plan View of the filter and valve assembly.

Fig, 4 is an enlarged perspective view of the valve body or block.

Fig. 5 is an enlarged partial cross sectional view showing the valve structure in metering position.

A top burner arrangement for a gas range is illustrated in Fig. 1 as having a top surface member l and four burners 2 which receive their gas from a suitable pipe or manifold 3 with each burner controlled by its controlling valve 4. Rather centrally positioned with respect to the four burners is a pilot housing 6 for a pilot flame to which gas is supplied by a conduit 1. Flash tubes 8 extend from the pilot housing 6 to a point in proximity to each burner. The top member I is cut away to demonstrate the pilot housing.- Su f--- fice it to say that a pilot flame burns constantly in the pilot housing 6 and when gas is supplied.

to one of the burners 2 by the opening of its valve 4 some of the gas flows through a flash tube. is

ignited by the pilot flame and the resultant back ignites thegas issuing from the burnerl- This iS all well known to those verseem the art and hi) further description seems to be necessary.-

As shown in Fig. 2 the filter and metering andcontrol valve is disposed between the main sup-- ply pipe or manifold 3 and the conduit or tube 1 The filter body preferably takes the form of a member ill, which may be fashioned from sheet metal as by means of a draw-mgoperation, hav ing a hollow body portion 1 l and asmaller screw threaded portion l2 arranged to be threaded into the manifold 3. A second body portion has a relatively large part I3 which slidably fits within the portion II, atapered part l4, an intermediatebe positioned by a ring-like element 24 abuts against a washer 25. When these parts are thus assembled the edge 26 of the portion H is spun over the tapered part 23 to thus hold the two elements in assembly. This provides for the filtering of the gas as it flows therethrough from the conduit 3 to the tube 7. p

In order to provide a controlling valve abody or block, as shown at 30, is provided. body or block may be obtained from hexagonal bai" stoek. preferably brass. which is cut off into sec tions of the desired length for fitting into the intermediate hexagonal portion IT). This valve body is, of course, inserted into position before the assembly is made as above described and it is preferably abutted against a, washer 3|. The purpose of the washer 3| is to insure that all gas flowing to the pilot must pass through the passages and ports in the body and not around the body.

The block is provided with a passage for gas which includes an inlet passage 35 which may be angularly disposed and this intersects a passage 36 which is formed in the block from one of its faces, as shown in Fig. 4. The block is also provided with an outlet passage or port 3i which communicates with the passage 36. The block is provided with a threaded hole in alignment with the passage 36 and a tapered seat 38 is at the junction of the hole and the passage 3%. The side Ia of the hexagonal intermediate part is provided with an opening in alignment with the hole 38 for the reception of a valving screw as which has a head 4| for receiving a suitable tool, such as a screw driver, and which preferably has a spring 62 interposed between the head and the wall I5a. The inner end of the screw is tapered to provide a valving portion as at 43 by which the passage or port 36 may be metered or closed when the tapered end it is adjusted to engage the seat 38.

The passages and the opening in the block 30 may be formed by drilling operations and these drilling operations are preferably performed on the block before it is inserted in the intermediate portion iii. The internal threads in the block may or may not be formed thereon before the block is inserted in position. The hole in the face 150. may be formed before or after the block is inserted. The hole in the face i541 may be formed by a drill after the block is inserted with the same drill passing into the block to enlarge the opening therein and the hole and the opening may both then be internally threaded as shown. Thus, by these simple expedients an effective metering and shutoff valve is provided in conjunction with a filter. The screw not only serves as a valving agency and metering agency but serves to lock the valve block in position.

I claim:

1. A combined filter and valve structure 4 adapted for use with gas for a pilot flame comprising, two cup shaped members telescoped together to form a chamber, filtering material in the chamber, one member having an extension for connection to a source of gas supply, the other member having an extension for connection to a conduit for carrying the gas to a pilot burner, one of said members having a hollow intermediate portion, a separate block of metal situated in said portion, said block of metal havinga passage therethrough for the flow of gas, a side wall of the intermediate portion and the block of metal having aligned openings therein with the opening in the block of metal intersecting said passage, the said opening in the block of metal having internal threads, and a valving screw threaded into the opening in the block of metal and passing out through the opening in said intermediate portion, said valving screw having an inner end for metering the passage through the block of metal.

.2. A combined filter and valve structure adapted for use with gas for a pilot flame comprising, two cup shaped members having relatively large portions telescoped together to form a chamber, filtering material in the chamber, one cup shaped member having a relatively ensmalled extension for connection to a, source of gas supply, the other member having a relatively ensmalled extension for connection to a source of gas supply, the other member having a relatively ensmalled extension for connection to a conduit for carrying the gas to a pilot burner, said other member having a hollow intermediate portion of intermediate dimensions located downstream from the filtering material, a separate block of metal positioned in said intermediate portion, said block of metal having a gas flow passage therein formed to provide a valve seat, the block of metal and the wall of the intermediate portion having aligned openings with the opening in the block of metal intersecting the passage, the opening in the block of metal having internal screw threads, and a valving screw passing through the opening in the intermediate portion and threaded into the block of metal and having a valving end portion arranged to meter and to seat upon the valve seat formation in said passage.

3. A combined filter and valve structure adapted for use with gas for a pilot flame comprising, two cup shaped members of formed sheet metal having relatively large portions telescoped together to form a chamber, filtering material in the chamber, one member having an extension for connection to a source of gas supply, the other member having an extension for connection to a conduit for carrying the gas to a pilot burner, said other member having a hollow intermediate portion located downstream from the filtering material, said intermediate portion having cross dimensions less than that of the chamber and being substantially hexagonal in cross section, a hexagonal metal body seated in said intermediate portion, said body having a passage therethrough so formed and shaped as to provide a seat, the metal body and the wall of the intermediate portion having aligned openings with the opening in the body intersecting the passage, the opening in the body being screw threaded, and a screw member passing through the opening in the intermediate portion and threaded into the open ing in the body and having an end portion arranged to co-operate with the valve seat to meter and to close the passage.

ERVIN H. MUELLER.

REFERENCES CITED The following references are of record in the;

file of this patent:

UNITED STATES PATENTS Certificate of Correction Patent No. 2,506,313 May 2, 1950 ERVIN H. MUELLER It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as Column 4, lines 4 and 5, strike out the Words and comma, the other member having a relatlvely ensmalled extension for connection to a source 0 and that the said Letters Patent shou follows:

f gas pp y,;

id be read as corrected above, so that the same may conform to the record of the case in the Patent Office. Signed and sealed this 5th day of December, A. D. 1950.

THOMAS F. MURPHY,

Assistant Commissioner of Patents. 

